Since nobody answered my original post but this is important (at least to
me), I thought I'd better repost my question (slightly updated).
Original post:
I'm still "toying" with the ODMG implementation and I stumbled upon
something strange (at least in my eyes). While working through the ODMG
testcases, I noticed that when I change the
PersonWithArrayTest.testStoreThreePersons test a slightly bit from
Transaction tx = odmg.newTransaction();
tx.begin();
tx.lock(karlHeinz, Transaction.WRITE);
tx.lock(kurt, Transaction.WRITE);
tx.lock(knuth, Transaction.WRITE);
tx.commit();
to
Transaction tx = odmg.newTransaction();
tx.begin();
tx.lock(kurt, Transaction.WRITE);
tx.lock(knuth, Transaction.WRITE);
tx.lock(karlHeinz, Transaction.WRITE);
tx.commit();
or to
Transaction tx = odmg.newTransaction();
tx.begin();
tx.lock(kurt, Transaction.WRITE);
tx.lock(knuth, Transaction.WRITE);
tx.commit();
tx.begin();
tx.lock(karlHeinz, Transaction.WRITE);
tx.commit();
then the test case fails. Is there a reason that I have to put the objects
in exactly the order "collection-owner first, then collection
elements" and that I have to lock the subobjects in the same transaction ?
Also, if I have already-stored objects then the test fails as well:
Transaction tx = odmg.newTransaction();
tx.begin();
tx.lock(kurt, Transaction.WRITE);
tx.lock(knuth, Transaction.WRITE);
tx.commit();
tx.begin();
tx.lock(karlHeinz, Transaction.WRITE);
tx.lock(kurt, Transaction.WRITE);
tx.lock(knuth, Transaction.WRITE);
tx.commit();
Thanks,
Tom
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